English
File converter / Documents / Convert to XLSX / XLS converter / XLSX to XLS

Convert XLSX to XLS

+
Choose file to convert to .xls
or drag and drop file

You can convert XLSX file to excel file as well as to variety of other formats with free online converter.

xlsx to xls

How to convert xlsx to xls?

How to convert xls to xlsx?
Step 1

Upload xlsx-file

Select xlsx file, which you want to convert, from your computer, Google Drive, Dropbox or drag and drop it on the page.
Step 2

Convert xlsx to xls

Select xls or any other format, which you want to convert.
Step 3

Download your xls-file

Wait till your conversion process will be completed and click download converted xls file.

Online and free xlsx to xls converter

Fast and easy
Just drop your xlsx files on the page to convert xls or you can convert it to more than 250 different file formats without registration, giving an email or watermark.
Don't worry about security
We delete uploaded xlsx files instantly and converted xls files after 24 hours. All files transfer with secured an advanced level of SSL encryption.
All in the cloud
You don't need to install any software. All xlsx to xls conversions make in the cloud and don't use any resources of your computer.

Office Open XML Document

File extension .xlsx
File category documents
Description XLSX – is an e-book created with one of the versions of the Excel program older than 2007. Thus the data have the form of tables consisting of columns and lines. Each table is divided into cells with a unique address, consisting of numeric and alphabetic characters. Cells contain data, both manually entered, and information that was obtained as a result of calculations. The extension allows the use of images, diagrams, and graphic information. XLSX files are formatted based on the Open XML standard, which will enable you to compress data by the type of ZIP. The archive contains a file for describing the table and individual files for each of its worksheets. The format makes it possible to develop and edit complex multi-sheet spreadsheets with various formulas and data sources.
Technical details Using the XLSX extension helps to optimize the file's content, the technology of managing, and restoring information. The format significantly increases the capabilities of binary files of obsolete Excel program variants. All applications that display XML can work correctly with the XLSX extension. Due to the preservation of data in XML format, reliable data storage is provided. This allows you to transfer files over local networks seamlessly.
Programs
Microsoft Office
LibreOffice
Kingsoft Office
Google Docs
Main program Microsoft Office
Developer Microsoft
MIME type
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Microsoft Excel Binary File Format

File extension .xls
File category documents
Description XLS – is a spreadsheet created by a popular Microsoft Excel application. It includes document data that is located in cells that have a specific address. They can contain formulas, mathematical equations associated with the information in other cells, and fixed information. It is often used for the development of graphs and charts. The format allows us to store and edit a broad range of parameters - images, tables, macros, types, diagrams. It has been widely used until the appearance of the 2007 version of Excel, and then it was replaced with the XMLSS extension. The information inside the XLS document is contained in a series of static-size streams. Their location is described using several segment distribution tables. It differs in backward compatibility and supports various file formats created for DOS. It is often used by web browsers to exclude the use of binary formats. The utility is included in the Microsoft Office suite and, in addition to Excel, can be opened by various applications like Apache Open Office, Libre Office, adapted to Mac OS, Windows, or Linux.
Technical details The format's relevance is explained by its simplicity, although it does not support separate functions, for example, storing VBA macros. Until XMLSS appeared, the Excel application used the Biff extension when formatting, created based on the IFF container format. Due to this, changes to the book templates and their contents were available. After introducing the new format in 2007, the program has not lost the backward compatible properties, which guarantees the wide distribution of XLS in the future. Subsequently, the XLS extension was replaced by the XLSM, XLSB, and XLSX formats.
Programs
Microsoft Office
LibreOffice
Kingsoft Office
Google Docs
Main program Microsoft Office
Developer Microsoft
MIME type
application/vnd.ms-excel

FAQ

❓ How can I convert xlsx to xls?
Firstly, select a xlsx file you want to convert or drag and drop it. Secondly, select xls or any other format you want to convert your file to. Then click convert and wait until your file is converted
⏳ How long should I wait to convert xlsx to xls?
Documents conversion usually takes a few seconds. You will convert xlsx to xls very quickly.
🛡️ Is it secure to convert xlsx to xls on OnlineConvertFree?
Sure! We delete your uploaded and converted files, so nobody has access to your information. All types of conversion on OnlineConvertFree (including xlsx to xls) is 100% safe.
📱 Can I convert xlsx to xls without software installation?
Absolutely! OnlineConvertFree doesn’t require installation. You can convert any files (including xlsx to xls) online on your computer or mobile.